How is capital gains tax calculated?

Taxable gain = sale price − acquisition cost − fees, or sale price − deemed cost (20/40%), whichever is lower. Capital income tax is 30% up to €30,000 and 34% above.

Capital gains tax calculator 2026 (stocks, Finland)

Calculate capital gains tax on stocks and compare actual acquisition cost with the deemed acquisition cost.

Sale price (€)Actual acquisition cost (€)Fees (€)Holding period (years)

Gain with actual costs€9,000.00

Gain with deemed cost (20 %)€8,000.00

Taxable gain (cheaper)€8,000.00

Capital income tax€2,400.00

The deemed acquisition cost is cheaper — you save €300.00.

Indicative calculation, not tax advice. PnlTrack does this automatically for every trade.

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